Knee brace



FIG. 1 is a perspective view of a knee brace, showing my new design, thebroken line showing is for illustrative purposes only and forms no partof the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a side elevational view thereof as viewed from the left sideof FIG. 1; and,

FIG. 7 is a side elevational view thereof, as viewed from the right sideof FIG. 1.

The ornamental design for a knee brace, as shown and described.